Chemistry of inorganic compounds – Rare earth compound
Patent
1987-05-20
1990-12-18
Bell, Mark L.
Chemistry of inorganic compounds
Rare earth compound
423275, 423593, 501126, 501152, 501 95, 252521, 505 1, 505780, H01B 108, H01B 1200, C01F 1700, C01F 1100
Patent
active
049785150
ABSTRACT:
Complex metal oxides are formed by calcining in molecular oxygen such as air at least one bimetallic complex of the formula A[BY] wherein A and B are metals and Y is a ligand associated with B. The bimetallic complexes are precipitated from aqueous solution by a transposition reaction of AX and M[BY] wherein X is a disassociable anion and M is a cationic species. The bimetallic complexes are useful in forming pure complex metal oxide fibers by a process of either dispersing the complex metal oxide or bimetallic precursors in a spinning composition of fluid organic polymer or by imbibing a polymeric fiber with species AX and precipitating out the bimetallic complex by treating the imbibed fiber with a compound containing the BY complex. The process is also useful in forming superconductive complex metal oxides. The use of the bimetallic complex as precursors for the complex metal oxides provide improved mixing of the metal elements on an atomic scale and thus require less severe mixing and annealing conditions to form the oxide.
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Bell Mark L.
Hoechst Celanese Corp.
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